Bench-dog



(No Model.)

F. LARSON.

BENCH DOG.

No. 378,890. Patented Mar. 6,1888.

I 77ZMs1m/ J M v 9 67% UNITED STATES PATENT OFFICE.

FREDERIG LARSON OF ROYALTON, MINNESOTA.

BENCH-DOG.

SPECIFICATION forming part of Letters Patent No. 378,890, dated March 6,1888.

Application filed December 27, 1887. Serial No. 259,063. (No model.)

To all whom it may concern:

Be it known that I, Fnnnnnro LARSON, a citizen of the United States ofAmerica, residing at Royalton, in the county of Morrison and State ofMinnesota, have invented certain new and useful Improvements inBench-Dogs, of which the following is a specification, reference beinghad therein to the accompanying drawlngs.

My invention relates to improvements in bench-dogs for the use ofcarpenters, joiners, &c., in which the longitudinally-reciprocating dogis provided with rack-teeth to engage with atoothed lever; and theobjects of myimprovement are, first, to provide a device of this naturein which the sliding dog is inclosed and protected and guided by a frameextending substantially its whole length; second, to afford facilitiesfor securing the device at both ends to the top of abench, and producingit at little expense. I attain these objects by the constructionillustrated in the accompanying drawings, in which- Figure l is aperspective view of a benchdog constructed in accordance with myinvention and shown connected to a bench. Fig. 2 is a top view of thesame with the cap-plate removed. Fig. 3 is a longitudinal section of thesame taken on the long axis of the dog.

In said drawings, A represents a flat metallic frame having its edge itturned up to support and guide the dog B substantially the whole lengththereof against the pressure exerted upon it by the segmental toothedlever O. The frame A has at its ends lugs a that support the dog 13against lateral pressure, and said lugs are perforated to receive rivetsor screws to fasten the cap-plate A to the bottom frame, A. The dog B isin the form of a rack having teeth 1) formed on one of its edges, withwhich mesh the teeth 0, formed around the segmental periphery of thehand-lever O, pivoted at c to the frame A and its cap-plate.

To give freedom of play to the dog and its operating-lever, the capplateis supported upon cylindrical lugs a projecting up from against the backof said pawl.

the frame A between therack and lover, and one of said lugs serves as ajournal for the pawl d, that is there located in proper position toengage with the teeth on the periphery of the lever O, and a spring maybe made to press The lugs to are perforated to receive rivets to securethe cap plate to the frame A at these points. To retain the bench-dogconnected with a bench, as at E, it is provided at each end with a downwardly-projecting pin, a, preferably slightly inclined rearwardly toenter holes 6, correspondingly bored in the top surface of the bench.The forward end of the dog is curved up at an acute angle to its body atI), to properly be forced into engagement with the end of a small thinboard, asf, and elevate its top surface above that of the cap plate. Theopposite end of said board is retained by avertically-adjustable dog, 9,of any suitable form.

Having now fully described my invention, I claim- 1. A bench-dogconsisting of the frame A, having lugs at each end, a turned-up edgebetween said lugs, and a pendent pin at each end, with a dog havingteeth on-one of its edges, a toothed segmental lever, a pawl pivoted tothe frame A, and a cap-plate extending the whole length of said frame,substantially as and for the purpose described.

2. The combination of the frame A, having the turned-up edge a the wholelength thereof,

' the cap-plate secured to said frame,.a toothed segmental lever pivotedto the frame and capplate, a pawl pivoted to said frame and adapted toengage with the teeth of the lever, and a dog having teeth on one of itsedges and its forward end curved up at an acute angle to its body,substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

FREDERIO LARSON. Witnesses:

-ANDREW O. ROBERTSON,

W. S. RoBER'rsoN.

